Which of the following reaction takes place at cathode in high temperature fuel cell using coal?

• A. \(\frac{1}{2}\) O2+ CO2+ 2e– →CO3-2
• B. C+2CO3-2 →3CO2+ 4e–
• C. CO+CO3-2 →2CO2+ 2e–
• D. H2+ CO3-2 → H2 O+CO2+ 2e–